Anti-dripping medical dropper capable of quantitatively taking liquid

Abstract

The utility model relates to the technical field of medical instruments, in particular to an anti-dripping medical dropper capable of quantitatively taking liquid, which is characterized in that a first perforated piston is slidably mounted in a transverse tube, a connecting rod is fixedly mounted in the first perforated piston, a spring is sleeved on the side wall of the connecting rod, and a vertical tube is fixedly mounted at the top of the transverse tube; a second sealing plate is fixedly mounted in the vertical pipe, a second perforating piston is slidably mounted in the vertical pipe, a third sealing plate is fixedly mounted at the top of the vertical pipe, a connecting rod drives a first perforating piston to move from left to right, and at the moment, the first perforating piston pushes the second perforating piston in the vertical pipe to move from bottom to top to perform piston movement; at the moment, the second perforating piston coincides with the vertical pipe, the connecting rod is loosened, the first perforating piston drives the second perforating piston to do piston motion, the second perforating piston moves from top to bottom, the atmospheric pressure outside the air bag is released, the liquid is pressed into the lower dropper again, and therefore the function of quantitative liquid taking is achieved.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a medical dropper that can dispense liquid quantitatively and prevents dripping. Background Technology

[0002] Droppers are divided into wide-bellied droppers and standard droppers. They consist of a rubber nipple and a pointed glass tube. Droppers are used to draw or add small amounts of reagent, as well as to draw up the supernatant and separate precipitates. Two problems exist during use: first, it is difficult to control the amount of reagent drawn when squeezing the rubber nipple with the thumb and forefinger, which can cause reagent to flow into the nipple and corrode it; second, rubber-nip droppers cannot precisely draw up reagents.

[0003] For example, a Chinese patent discloses a medical quantitative sampling drip tube (patent number: CN215963625U). When the air bladder is released, the liquid completely fills the inner liquid flow tube, and the excess liquid flows into the liquid buffer chamber. When the air bladder is squeezed again, only the liquid in the inner liquid flow tube flows out. Therefore, quantitative liquid aspiration and dripping can be achieved. The outer tube is fixed by the cooperation of the annular convex strip and the annular groove, which facilitates the installation between the drip head and the tube body. By setting a connecting strip, not only is the connection between the outer tube and the tube body convenient, but the loss of the outer tube can also be effectively prevented.

[0004] However, during the implementation of the above technical solution, at least the following technical problems were found: As mentioned above, when the dropper is removed from the container and the air bladder is squeezed again during multiple liquid collection operations, the liquid inside the dropper will flow back into the container. This may cause contamination of the sample or drug solution, affecting the accuracy of the test results or the treatment effect. For some medical operations that require precise measurement and maintenance of purity, such as the use of micro-reagents and the extraction of precious drugs, the negative impact of this backflow phenomenon is even more prominent. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a quantitative liquid dispensing and drip-proof medical dropper. This solves the problem mentioned above where, during multiple liquid dispensing operations, when the dropper is removed from the container and the air bladder is squeezed, the liquid inside the dropper flows back into the container. This can contaminate the sample or medication, affecting the accuracy of test results or treatment efficacy. For some medical procedures requiring precise measurement and purity maintenance, such as the dispensing of trace reagents or the extraction of precious medications, the negative impact of this backflow phenomenon is even more pronounced.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A drip-proof medical dropper for quantitative liquid dispensing includes a horizontal tube. Inside the horizontal tube are a first sealing plate, a first perforated piston, a connecting rod, a spring, a vertical tube, a second sealing plate, a second perforated piston, and a third sealing plate. The first sealing plate is fixedly installed inside the horizontal tube. The first perforated piston is slidably installed inside the horizontal tube. The connecting rod is fixedly installed inside the first perforated piston. The spring is sleeved on the side wall of the connecting rod. The vertical tube is fixedly installed at the top of the horizontal tube. The second sealing plate is fixedly installed inside the vertical tube. The second perforated piston is slidably installed inside the vertical tube. The third sealing plate is fixedly installed at the top of the vertical tube.

[0010] Preferably, a connecting pipe is fixedly installed at the top of the horizontal pipe, and the connecting pipe is fixedly installed with the vertical pipe.

[0011] Preferably, an airbag is fixedly installed at the top of the connecting pipe.

[0012] Preferably, a buffer ball is fixedly installed at the bottom of the horizontal tube.

[0013] Preferably, a dropper is fixedly installed at the bottom of the buffer ball.

[0014] Preferably, the inside of the dropper is coated with polytetrafluoroethylene, and the buffer ball and the side wall of the dropper are provided with graduations.

[0015] (III) Beneficial Effects

[0016] 1. The connecting rod drives the first perforated piston to move from left to right. At this time, the first perforated piston will push the second perforated piston inside the vertical tube to move from bottom to top. The second perforated piston will then overlap with the vertical tube, squeezing the air bladder again. The air in the air bladder will be discharged from inside the vertical tube. Then, the connecting rod is released, the spring returns, and the connecting rod drives the first perforated piston to move from right to left. The first perforated piston drives the second perforated piston to move from top to bottom, blocking the vertical tube. At this time, the first perforated piston overlaps with the horizontal tube. The air bladder is released, and the external atmospheric pressure once again forces the liquid into the lower dropper, completing the secondary liquid extraction. According to the scale on the side wall of the device, a specified amount of liquid is extracted, thereby achieving the function of quantitative liquid extraction.

[0017] 2. When liquid is drawn into the buffer ball, it will pass through the dropper. The dropper makes it less likely for the liquid to drip from the nozzle due to gravity and surface tension. When the suction or addition of liquid stops, the curved part in the dropper can retain some liquid, forming a liquid seal. Furthermore, due to the PTFE coating, a small amount of liquid will adhere to the inner wall of the PTFE coating, reducing liquid adhesion and thus preventing dripping. Attached Figure Description

[0018] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a structural diagram of the airbag of this utility model;

[0021] Figure 3 This is a structural diagram of the buffer ball of this utility model;

[0022] Figure 4 This is a structural diagram of the connecting pipe of this utility model.

[0023] Legend: 11. Horizontal tube; 12. First sealing plate; 13. First perforated piston; 14. Connecting rod; 16. Spring; 17. Vertical tube; 18. Second sealing plate; 19. Second perforated piston; 21. Third sealing plate; 22. Connecting tube; 23. Airbag; 24. Buffer ball; 25. Dropper; 26. Polytetrafluoroethylene coating. Detailed Implementation

[0024] This application provides a drip-proof medical dropper for quantitative liquid dispensing, effectively solving the problem mentioned above where, during multiple liquid dispensing operations, the liquid inside the dropper flows back into the container after being removed and the air bladder is squeezed. This can contaminate the sample or medication, affecting the accuracy of test results or treatment efficacy. For some medical operations requiring precise measurement and purity maintenance, such as the dispensing of micro-reagents or the extraction of precious medications, the negative impact of this backflow phenomenon is even more pronounced. The connecting rod drives the first perforated piston to move from left to right. At this time, the first perforated piston will push the second perforated piston inside the vertical tube to move from bottom to top. Then, the second perforated piston will overlap with the vertical tube, and the air bladder will be squeezed again. The air in the air bladder will be expelled from the vertical tube. Then, the connecting rod is released, the spring returns, and the connecting rod... The first perforated piston moves from right to left, which in turn drives the second perforated piston to move from top to bottom, blocking the vertical tube. At this point, the first perforated piston aligns with the horizontal tube, releasing the air bladder. The external atmospheric pressure then forces the liquid back into the dropper, completing the secondary liquid extraction. The specified amount of liquid is extracted according to the scale on the side wall of the device, thus achieving the function of quantitative liquid extraction. When the liquid is drawn into the buffer ball, it will pass through the dropper. The dropper makes it less likely for the liquid to drip from the tube opening under the action of gravity and surface tension. When the extraction or addition of liquid stops, the curved part in the dropper can retain some liquid, forming a liquid seal. Furthermore, due to the PTFE coating, a small amount of liquid will adhere to the inner wall of the PTFE coating, reducing liquid adhesion and thus preventing dripping.

[0025] Example

[0026] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the technical solution in this application effectively solves the problem mentioned above: when the dropper is removed from the container during multiple liquid collection operations, the liquid inside the dropper flows back into the container when the air bag is squeezed, which may cause contamination of the sample or medicine, affecting the accuracy of the test results or the treatment effect. For some medical operations that require precise measurement and maintaining purity, such as the use of micro-reagents and the extraction of precious medicines, the negative impact of this backflow phenomenon is more prominent. The overall idea is as follows: A quantitative liquid collection anti-drip medical dropper includes a horizontal tube 11. The horizontal tube 11 is provided with a first sealing plate 12, a first perforated piston 13, a connecting rod 14, a spring 16, a vertical tube 17, a second sealing plate 18, a second perforated piston 19, and a third sealing plate 21. The first sealing plate 12 is fixedly installed inside the horizontal tube 11, the first perforated piston 13 is slidably installed inside the horizontal tube 11, the connecting rod 14 is fixedly installed inside the first perforated piston 13, the spring 16 is sleeved on the side wall of the connecting rod 14, and the vertical tube 17 is fixedly installed inside the horizontal tube 11. At the top of the horizontal tube 11, the second sealing plate 18 is fixedly installed inside the vertical tube 17. The second perforated piston 19 is slidably installed inside the vertical tube 17. The third sealing plate 21 is fixedly installed at the top of the vertical tube 17. The connecting rod 14 drives the first perforated piston 13 to move from left to right. At this time, the first perforated piston 13 will push the second perforated piston 19 inside the vertical tube 17 to move from bottom to top to perform piston movement. At this time, the second perforated piston 19 will overlap with the vertical tube 17 and squeeze the airbag 23 again. The air in the airbag 23 will be released from the vertical tube 17. The liquid is discharged. At this time, the connecting rod 14 is released, the spring 16 rebounds, and the connecting rod 14 drives the first perforated piston 13 to move from right to left. The first perforated piston 13 drives the second perforated piston 19 to make piston movement, so that the second perforated piston 19 moves from top to bottom and blocks the vertical tube 17. At this time, the first perforated piston 13 coincides with the horizontal tube 11. The air bag 23 is released, and the external atmospheric pressure once again forces the liquid into the lower dropper 25, completing the secondary liquid extraction. According to the scale on the side wall of the device, a specified amount of liquid is extracted, thereby achieving the function of quantitative liquid extraction.

[0027] A connecting pipe 22 is fixedly installed at the top of the horizontal pipe 11. The connecting pipe 22 is fixedly installed with the vertical pipe 17. An airbag 23 is fixedly installed at the top of the connecting pipe 22. A buffer ball 24 is fixedly installed at the bottom of the horizontal pipe 11. A dropper 25 is fixedly installed at the bottom of the buffer ball 24. When liquid is drawn into the buffer ball 24, the liquid will pass through the dropper 25. The dropper 25 makes it less likely for the liquid to drip from the pipe opening under the action of gravity and surface tension. When the suction or dripping of liquid stops, the curved part in the dropper 25 can retain a part of the liquid to form a liquid seal. Under the action of the polytetrafluoroethylene coating 26, a small amount of liquid will hang on the inner wall of the polytetrafluoroethylene coating 26, reducing the adhesion of liquid and thus preventing dripping.

[0028] The inside of the dropper 25 is provided with a polytetrafluoroethylene coating 26, and the buffer ball 24 and the side wall of the dropper 25 are provided with graduations. The polytetrafluoroethylene coating 26 will reduce the phenomenon of water hanging inside the dropper 25, thereby achieving the function of assisting in preventing dripping.

[0029] To address the problems existing in the prior art, this utility model provides a medical dropper for quantitative liquid dispensing without dripping. The connecting rod 14 drives the first perforated piston 13 to move from left to right. At this time, the first perforated piston 13 pushes the second perforated piston 19 inside the vertical tube 17 to move from bottom to top, performing a piston movement. The second perforated piston 19 then overlaps with the vertical tube 17, squeezing the airbag 23 again. The air in the airbag 23 is expelled from inside the vertical tube 17. Then, the connecting rod 14 is released, the spring 16 returns, and the connecting rod 14 drives the first perforated piston 13 to move from right to left. The first perforated piston 13 drives the second perforated piston 19 to perform a piston movement, causing the second perforated piston 19 to move from top to bottom, blocking the vertical tube 17. The first perforated piston 13 overlaps with the horizontal tube 11, releasing the air bladder 23. The external atmospheric pressure forces the liquid back into the dropper 25, completing the secondary liquid extraction. According to the scale on the side wall of the device, a specified amount of liquid is extracted, thereby achieving the function of quantitative liquid extraction. When the liquid is drawn into the buffer ball 24, the liquid will pass through the dropper 25. The dropper 25 makes it less likely for the liquid to drip from the tube opening under the action of gravity and surface tension. When the extraction or addition of liquid stops, the curved part in the dropper 25 can retain a portion of liquid, forming a liquid seal. Under the action of the polytetrafluoroethylene coating 26, a small amount of liquid will hang on the inner wall of the polytetrafluoroethylene coating 26, reducing the adhesion of liquid and thus preventing dripping.

[0030] Working principle:

[0031] First, press the airbag 23 to expel the air inside. Then, place the dropper into the container and release the airbag 23. Atmospheric pressure will force the liquid into the lower dropper 25. When the specified volume is not reached, press the connecting rod 14. The connecting rod 14 drives the first perforated piston 13 to move from left to right. At this time, the first perforated piston 13 will push the second perforated piston 19 inside the vertical tube 17 to move from bottom to top, performing piston movement. Then, the second perforated piston 19 will overlap with the vertical tube 17, squeezing the airbag 23 again. The air will be discharged from the inside of the vertical tube 17. At this time, the connecting rod 14 is released, the spring 16 rebounds, and the connecting rod 14 drives the first perforated piston 13 to move from right to left. The first perforated piston 13 drives the second perforated piston 19 to make piston movement, so that the second perforated piston 19 moves from top to bottom and blocks the vertical tube 17. At this time, the first perforated piston 13 coincides with the horizontal tube 11. The air bag 23 is released and the external atmospheric pressure once again forces the liquid into the lower dropper 25, completing the secondary liquid extraction. According to the scale on the side wall of the device, a specified amount of liquid is extracted, thereby achieving the function of quantitative liquid extraction.

[0032] The second step involves the liquid being drawn into the buffer ball 24 and then passing through the dropper 25. The dropper 25 makes it less likely for the liquid to drip from the nozzle due to gravity and surface tension. When the liquid is stopped being drawn or added, the curved part of the dropper 25 can retain some liquid, forming a liquid seal. Furthermore, due to the PTFE coating 26, a small amount of liquid will adhere to the inner wall of the PTFE coating 26, reducing liquid adhesion and thus preventing dripping.

[0033] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A medical dropper for quantitative liquid dispensing with drip prevention, comprising a horizontal tube (11), characterized in that, The horizontal tube (11) is provided with a first sealing plate (12), a first perforated piston (13), a connecting rod (14), a spring (16), a vertical tube (17), a second sealing plate (18), a second perforated piston (19), and a third sealing plate (21). The first sealing plate (12) is fixedly installed inside the horizontal tube (11), the first perforated piston (13) is slidably installed inside the horizontal tube (11), the connecting rod (14) is fixedly installed inside the first perforated piston (13), the spring (16) is sleeved on the side wall of the connecting rod (14), and the vertical tube (17) is fixedly installed on the top of the horizontal tube (11). The second sealing plate (18) is fixedly installed inside the vertical tube (17), the second perforated piston (19) is slidably installed inside the vertical tube (17), and the third sealing plate (21) is fixedly installed on the top of the vertical tube (17).

2. The medical dropper for quantitative liquid dispensing and drip prevention as described in claim 1, characterized in that, A connecting pipe (22) is fixedly installed at the top of the horizontal pipe (11); The connecting pipe (22) is fixedly installed with the vertical pipe (17).

3. A drip-proof medical dropper for quantitative liquid dispensing as described in claim 2, characterized in that, An airbag (23) is fixedly installed at the top of the connecting tube (22).

4. A drip-proof medical dropper for quantitative liquid dispensing as described in claim 2, characterized in that, A buffer ball (24) is fixedly installed at the bottom of the horizontal tube (11).

5. A drip-proof medical dropper for quantitative liquid dispensing as described in claim 4, characterized in that, A dropper (25) is fixedly installed at the bottom of the buffer ball (24).

6. A drip-proof medical dropper for quantitative liquid dispensing as described in claim 5, characterized in that, The inside of the dropper (25) is provided with a polytetrafluoroethylene coating (26), and the buffer ball (24) and the side wall of the dropper (25) are provided with graduations.

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